Firstly for the people who say their children wreck shoes (flappy toes and hollow worn down heels) you NEED this product - Shoe Goo. Honestly it's amazing for repairing shoes. DH has a pair of ancient DM Chelsea boots that are held together by this stuff. He's on his 3rd extra winter now with these boots. Its not the prettiest looking repair but very handy, particularly near end of term to stretch 'still fit but a bit flappy' shoes out to the summer holidays.
Anyway back to the point. No you are not a bad mum if you buy something other than clarks, startrite or Hamptons (never heard of the last brand). So long as the shoes fit well and suit the shape of your child's feet then it doesn't matter what brand you buy. Watch YouTube videos on how to fit shoes, once you know what you are looking for its easy.
I personally like to buy DD shoes that are a good quality, soft, flexible leather. We have tried clarks, startrite, ricosta, Lelli Kelly and Tesco for school shoes. The Ricosta held up the best and looked practically new/ scuff free after a full years wear - only the soles showed any real sign they had been worn.
The Tesco cheapies (real but not very soft leather) were a stop gap pair I bought as I was skint and DD had outgrown her school shoes but they actually lasted about 4 months before the leather strap stretched out too much and became flappy and dragged on the ground when pulled tight enough to hold the shoe on. Couple of scuffs but polished out fine. Ok for the price I suppose and if it was all I could afford then I would feel bad about it.
The (plain/ non blingy) Lelli Kellys were disappointing. The sole wore out and was really thin and flat after 3 months. My DD is easy on her shoes and a tiny little thing so no excuse for them to ware out as fast as they did. Shame as the leather was still scuff free and buttery soft.
This year we have startrite princess Serena shoes and they are holding up beautifully so far.
On another note. I don't really notice and probably couldn't tell at a glance what brand of shoes other children have on their feet (well apart from the blingy strap Lelli Kelly ones because you can't miss it!) I would guess in DDs school there is a large mix of supermarket to more expensive brands as its a mixed catchment area. I would never judge a parent on the brand of shoes they choose for their child as it's none of my business.