I know this isn't what Ronald is in any way saying, but this video dropped on Patreon right as I was mulling over how some of the more active members of the PF2 subreddit treat the published rules, and how hostile (not necessarily aggressive, but absolutely hostile) that space is to discussing house rules and homebrewed systems.
The discourse around "suboptimal" systems breaks down into the search for the optimal version of the system as published, as if that is some global optimum, and not one of countless local optima.
This comes out in phrases like "I think this is too powerful". But different tables are going to want different things, and the game actively encourages players to figure out what works best for any given group.
All of this is to say, I see nothing wrong with hero points increasing the level of success of your previous roll, if that's what the table wants. Some people want a safety blanket, and there's a mechanic right there that gives one. Some people are going to want something else, and that's great, too.
But it would be really nice if we had some kind of house rule and homebrew repository where people could see the range of things people have tried, without a bunch of seagulls flocking in to as "Why?" over and over.