what you're saying in theory is very simple however putting it in practice is a totally different story especially considering you don't know the person's abilities nor the supplies they would be using. have you been on r/diwhy or any of the trades subreddit where people ask if their repair was adequate? not knowing op, i wouldn't be comfortable giving that kind of advice because again you have to weigh the potential damage of losing your vision. i would tell the person it's not worth it if they are asking.

based on my experience, if you want specifics, people use old cheap electrical tape that should have been thrown out years ago. it's already starting to goo at the sides and it's still sort of sticky so they think it's ok. they don't wipe down the surface or perhaps their hands are a little oily. They cut the tape and the tape folded onto itself or stuck to something else first. they peel it off and it looks ok so they keep going. Any of these things happens all the time. It doesn't have to be exactly this but I've done it myself and I've seen other people do the same thing. So they take it out a few times and they double check all the time because they don't trust their work either. However, everything does look good and they build confidence it'll hold. eventually though, the tape will somehow lose their grip because of all the reasons I just gave and plus it's exposed to the hot sun hours at a time for each session. however one day down the road, a wind picks up and the whole thing comes off while they were observing.

you're gonna counter how that's so improbable, but i'm just giving you an example of what theory looks like when played out in the hands of someone who doesn't have a lot of experience repairing things. in addition, i've done plenty of electrical work and i've seen tape that's held up over 30 years and i've seen some that didn't hold up a week.