everyone is entitled to an opinion, even if that opinion is quite clearly wrong. Phaser is a tiny team of very dedicated individuals and they have successfully produced one of the best JS/TS game frameworks. If you want better documentation, why not produce some? Want to help the team grow so they can afford to employ someone to write docs? Buy the books, pledge to the Patreon. Basically: help in some way. That's much more productive than suggesting they did all this work simply to sell some books.
An opinion can't be wrong, a statement maybe, but a statement "this is what I believe: <opinion>" is in any case not up to debate. Because An opinion has to be supported by arguments and those can be wrong. But of course, you are entitled to your opinion.
