It's necessary if you want anyone other than programmers and IT people who have a lot of time on their hands to use it. Not only is good UI/UX required for end

It's necessary if you want anyone other than programmers and IT people who have a lot of time on their hands to use it. Not only is good UI/UX required for end users, it's also required for expert users who are busy and don't have time for your 25-step installation procedure or constantly dinking around with something until it works. Actual percentages vary by type of software and user base, but I'd say it's almost never less than 25% of the effort for developer tools, enterprise, backend, etc. software and is probably closer to my 90-95% number for most software designed for end users. If you want a world where freedom is only for software developers and IT professionals and everyone else lives in a locked-down surveillance panopticon where they don't even control their own data, then maintain the status quo. Personally I did not get into this industry to be a mercenary knight for a bunch of neo-feudal lords.