Admittedly the first few weeks suck but then you’re free from the shackles of sulfates. Conditioner has cleansing properties, I think, so just use that instead! Big Shampoo is a scam!
don't believe the hype around certain shampoos. whatever works for you works for you. you might also find that it helps to switch shampoos every few months-- my hair gets used to something and starts looking like shit, and then i switch to something else and it looks great