SaaS may not be a particularly good example because like others have mentioned, there are costs to it, and it's up to you to decide whether the price is worth the convenience.
The anti-subscription sentiment is not without merit, however. Software that just runs on your computer now has a fucking subscription for no reason. Adobe, games, etc. That is rent-seeking, because I want to pay for the goddamn thing once and own it. I don't care for support or upgrades; if I do, I'll buy the newer version.
Nobody cares about the costs to offer a product. People care about the value provided.
If I think a service is worth $20 month, that will not change if their cost structure changes and suddenly it costs them $1 or $100 per month to offer. It’s worth $20 to me either way. If their cost becomes $1, I rely on competition to create the consumer surplus.
The anti-subscription sentiment is not without merit, however. Software that just runs on your computer now has a fucking subscription for no reason. Adobe, games, etc. That is rent-seeking, because I want to pay for the goddamn thing once and own it. I don't care for support or upgrades; if I do, I'll buy the newer version.