It's not surprising that commercial queries produce ads.
"what are telescopes", "astronomy", "skywatching", "how to use a telescope", "telescope construction", and "telescope history" on the other hand are all web results and no ads.
Hand-picking a highly-commercial query and using it to generalize about all queries is kind of BS.
Looking at my past weeks worth of search history there are very few commercial intent queries. And when I was doing commercial intent queries (buying some rock climbing equipment) Google Shopping ads were actually pretty helpful in doing my research because it allows you to rank the results of different retailers together which is something I previously had to do by going to each individual site and checking their prices.
It misses sellers that haven't chosen to advertise on Google Shopping but all of my go-to online shops for gear (Backcountry, Moosejaw, REI, EMS, gearx, gear co-op, Campsaver, etc.) are doing it so it works quite well for me.