Personally I couldn't care less about things being "visually pleasing", to me this is an accessibility feature. People with sight issues or dyslexia might want to use different fonts and weights, they might want high contrast colors, etc. The aesthetic personalization opportunities are second to that.

More importantly: this isn't hard. They did it in Windows 3, an OS that had an 8MB install size and required a mere 2MB of RAM. That we can't provide this functionality in 2021 with all these supposedly highly skilled software "engineers" who consider themselves so ridiculously productive because of all the complicated abstractions they use, on hardware that is several orders of magnitude more powerful than was available to Win 3... well it's completely ridiculous and we, as an industry, should be ashamed.