And when he arrives at the planet and sense Frieza's power, he still flies immediately to save Gohan.
Nothing in Piccolo's approach even suggests that he was confident in taking on Frieza. He arrives on Namek and
immediately seeks out Gohan. Instead of sensing out Gohan though, he
feels the presence of Frieza (leaving him visibly shaken and sweating), Gohan, Krillin, and Vegeta, and rushes over to Gohan's location. On the way, he
senses Frieza's power grow even higher, a power that surpassed his initial estimations of Frieza.
But Krillin and Gohan can sense Frieza, and they still wish for Piccolo to get transported there.
They wish Piccolo back because
Kami will return as a result, and they transport him to Namek because
he wanted to come and avenge his people. However, nobody at that time—not Gohan, Krillin, Vegeta, or Piccolo—had sensed Frieza's power yet as he had not came rushing towards them until afterward.
Alright, let's get back to the stupid shit.
Based on this, we can assume that Kami's fusion multiplies x2 Piccolo's power level
"
How foolish... He diminished by half the power with which he was gifted at birth! If he had come back together as one, he might not have had to die..."
By fissioning, the Nameless Namekian cut in half the power he received from birth; however, as we all know, the Piccolo portion
grew stronger.
Guru also states that had Piccolo and Kami merged once more during the Invasion of the Saiyans, he wouldn't have died, implying that he would be able to stand up against the Saiyans which is weird, because Vegeta was far above two-times his Power Level.
Why is that strange? You don't need to be two times stronger than other person to stomp them (Piccolo vs 3rd Form Frieza, Cell vs Gohan SS2, etc)
Gohan was getting dogged on by a suppressed Cell as a Super Saiyan, and completely bullied a full power and even transformed Cell effortlessly as a Super Saiyan 2. That was no mere two-times difference. And, who's to say that Frieza only two-times as powerful entering his Third Form?
Didn't Nail himself praise Piccolo for his power, saying that it was "astonishing"?
"Praising someone for their power" is not the same as saying "This guy is more powerful than me". It's a praise; nothing more.
But even then, this means little to nothing, since Nail then
immediately went on to say, "
If you were truly one... as a Namekian... then you might be able... to defeat... even Freeza...", suggesting "Oh, Piccolo is definitely not
half as powerful as Frieza, and thus High 5-A". Even Piccolo himself
considered his power to be inferior to Frieza's and believed that he would need to fuse with Kami once again to reach his level power.
And, let's for a moment, assume that Piccolo is around Nail's Power Level of 40,000. Frieza's Power Level of 580,000 trumps over that by fourteen and a half times—
not two-times. Oh, but you're assumption is that Piccolo is 290,000,
based on literally nothing.
Also, Namekian Fusion does not warrant different multipliers based on who you assimilate. It is an increase of many times across the board, with the lead gaining the abilities and the memories of their partners. Nothing suggests that merging with Kami simply netted him twice as much power as before, and there is nothing to reasonably suggest that, especially given the context behind their fusionism.
Nail, having a little grasp on Frieza's capabilities after that thrashing,
believed that Piccolo would need an increase of "many fold" in order to take on Frieza, furthering disproving the notion that "Piccolo is only half as powerful as Frieza".
Oh! Here's more proof that
Piccolo was scared shitless of Frieza's power.
You got anymore
dumbass argument? I'll eat them right up.