I agree with other posters that many diy jobs often escalate from a relatively simple task to 3 other increasingly complicated ones, moving incrementally away from your knowledge base.
There's three types of people, tradespeople, Diy-ers and people who do diy. Diy-ers are basically semi-pro and have most of the kit, people who do diy have the bare minimum and buy tools as they need them, or bodge it as best they can.
Diy can be extremely stressful, especially when you have limited time/budget. I recently refurbished our kitchen. Cheapest quote was 10,000, I did it for 3 - it's obviously not nearly as good as if a tradesperson did it (I'm firmly in the 'people who do diy' group), but it works, looks better (at best!), and saved us 7,000 we really didn't have.
However, I have to say it was one of the most stressful periods of my life. I was doing tasks I'd never done before, 'safe' in the knowledge that if it went wrong it would cost us money we really couldn't afford, and stretch out the length of time the house was in a huge mess for even longer. I cried about 3 times, and I never cry (not 'cos I don't think men should, I just don't).
The pressure was really on me in a role that I'm ill-equipped for (it's entirely different to my day job), my wife, by her own admission, couldn't have done it, and our kitchen, for a variety of reasons, was an absolute disaster, and just getting worse. With limited finances, therefore, I had to do it.
I'm always loathe to talk about gender roles and the pressure on men/women to fit them and 'do what a man/woman should', as overall women have it entirely worse. But societally, there is an expectation that as a man you do this stuff, regardless of your skills or experience or temperament, and although for years I called BS on that sort of sexism, I can't pretend that it didn't affect how I felt about myself.
Although, fortunately, that thinking is changing, and while there are some men who are performative in their skills/effort, some of us are just stressed and challenged by what are actually quite difficult skills, and also feel the real or just assumed pressures to complete them, regardless of our ability to do so.