My "actual data" would of course entail my relatives and friends, who indeed can "fix shit", while the current generation is mostly useless in that regard. Can't solder, can't crimp, can't change an oil filter or even headlight bulb, can't measure nor cut nor fasten lumber, etc. etc.
And for every millennial who can't change an oil filter or fasten lumber there is a 50 year old who can't program their digital clock or reconfigure their new cellphone without waiting for their kids to come home for the holidays. Different generations have different skills, and they usually align with the skills that were useful to them in their early life.
I think it depends on what people in that generation they look at, for example even though I am a member the described generation I can and have soldered electronics back to working order and spliced electrical cables, I can do minor car maintenance/repair and do complete teardowns of small engines (lawn mower, chainsaws etc) and fix them, I can build cabinetry and have roofed a building including making new trusses from scratch. I also know a number of survival/primitive skills, (rope making, fishing, trapping, fire building (sans matches and lighter) edible pants, etc. But then again I had parent that made me go into a scouts like groups and insisted that I take some practical classes in high school like small engines and made me learn to replace all of the fluids, spark plugs distributer and such before I could learn to drive. Then I have friends that look at everything as a magic black box that does things for the; then they take them to repair shoppes or buy new one when it stops. The big problem I see is people that have aren't taught the skills not because they are incompetent or uninterested but because then never were put it a situation to learn how and the up front cost to learn now it much higher because classes aren't free after high school and all there time is taken up working when classes are available.