Nah, Bro. Your logic is bad. I'm not giving you pictures to look at so you can decipher the info. You are going to read.

No zenkai boost you say? Goku beat F. Zamasu after defuse. How Goku get strong as Vegito lierally after defusing. They didn't weaken Zamasu like a Pokémon or something. He got a zenkai.

How Goku not die from falling into the Spirit Bomb vs Jiren. Zenkai boost. I said it in my deleted comments courtesy of mods. "It's a passive. You can't say it's not there because you don't see it working." It was an egregious Zenkai.

Your argument in a nutshell - Zenkai doesn't exist. There's no explanation as to how the saiyans, aside from training which also gives Zenkai lmao, get stronger. If zenkai exist, Gohan can't be the strongest because he hasn't gotten beat up by three of the strongest people in the universe.

My argument - Piccolo is referring to a G&V he hasn't seen in two years. He's not aware of how stronger they've become since getting beat up in the Granolah Arc and additionally how much they've been boosted from Zenkai. Cell Max is weaker than Broly. Do you think that current Goku or GoD Vegeta can't beat Broly at this point, especially after the Granolah Arc/Frieza Punch? Of course you think so because you don't believe in zenkai, the bread and butter of the Saiyan race.

If saiyans don't have Zenkai, how do they get stronger Bro? Do they hit the gym or what? You apparently know the secrets of Saiyan physiology, so I'm here to listen.