I believe, based on other comments I have seen on HN, that my view is a pretty widespread one.
That may be a partial explanation, but I've also heard this frequently from people who sell to only retail customers.
If you're the low cost plumber, pressure washer, or lawn care, you're going to have a headache compared to the people who operate up market.
If a person pays for a thing they are more invested in making it something worthwhile and thus less attacks.
If something is free and any issue, it suddenly is horrible because they never associated value with it from the beginning.
It is a psychological thing and plays into many parts of the market.
Not only that. I would buy paid app only if convinced that it is worth it. I am willing to try free app - and in case that it is garbage, rate it accordingly.
Also, free versions often have strong limitation or massive amounts of ads: so they are worse than paid one.
There’s self selection, if you pay for something then it you’re more selective in what you get. “Free” apps are also worse due to inserting advertising.