Tons of people seem willing to do without Steam features given Fortnite not being on Steam and still growing so popular is what enabled the Epic store in the first place for example, but there are other great games that did fine without Steam, like Minecraft.
People are generally willing to go without features
mostly in massively popular, zeitgeisty service-based games.
Is the League of Legends client a pile of spaghetti code, held together with duct tape, gum and staples? Absolutely. Do people play the game anyways? Sure. Why? Because there's no alternative. You either deal with their free garbage client, or you don't play.
Is the Epic Launcher a slow, laggy piece of garbage with zero features? Absolutely. Do people still boot it up to get to Fortnite? Definitely. Why? Because there's no alternative. You either deal with their free garbage client, or you don't play.
When you get away from online, F2P and/or service games, and especially once you get into actual paid full-price titles, people have more "options" to obtain games.
Does that mean piracy is right? No. Is it a market reality? Yes.
If people turn to piracy I see it as an excuse, Steam still has tons of games so just buy your games there and don't even play what's elsewhere, if you want to play the games elsewhere then suck it up and pay for them same as you'd do on Steam, it's not like Steam is cheaper either for most (I'm sure any regional issues will be resolved for most services at some point) since it's the same companies and publishers accepting to put their games on sale, if they put them on sale on Steam they'll put them on sale elsewhere just as well.
Piracy may be an "excuse" for a person that wants to play a game, but that doesn't mean it's wrong to try and account for those people. Gabe/Valve and the people at GOG have long contended (and are absolutely right) that piracy is a service issue.
If you offer an accessible,
affordable, hassle-free way to buy games, people will be much more willing and likely to buy games legally. That's how GOG and Valve turned Eastern Europe from a gigantic hellhole of piracy that no one else wanted to deal with, into a place where the market has thrived. Not only has the
market thrived, the efforts to legitimize the market have also arguably led to an uptick in the overall development industry as well.
I don't even know what the second bolded line means. Steam is cheaper for most people than other storefronts, and it's definitely cheaper in a huge number of cases than the EGS. The only places that beat Steam's prices consistently are key-resellers, which only exist because Steam allows key-generation.