I’m sorry but I would tend to completely disagree with you. The schools competitions do bring talent through, I know people who were the fastest in their year so went to boroughs, did well, made counties and ended up representing the county, without being at a club. Each youth age and gender group (u13, u15, u17,)has about 200 ranked sprinters for just 100m in 2020 (bearing in mind the lack of competitions this year), so that’s around 1,200 just for ranked youths. Add on about 600 more for ranked senior men and women. Even then that is only those who are fast enough to be ranked (many more compete who aren’t fast enough), and this only 100m, if you include 200,300 and 400 then you’d have quite a lot more than 1000 people (obviously some people will be on multiple rankings). (The rankings are at
https://www.thepowerof10.info/rankings/rankinglist.aspx?event=100&agegroup=U17&sex=W&year=2020
)
Also as an athlete currently in the talent pathway system who is surrounded by numerous amazing coaches I would disagree with your statement about poor coaching standards, mentoring and pathways because I couldn’t have asked for anything better.
I apologise for the rant, you may have personal experience to base your post off, in which case I apologise- it was just it didn’t seem to match the excellent experience I have as a junior athlete in the uk.