I agree. So a great many who start training will never find a job in the airlines, and will end up with a big bill to pay when they finally give up! The trick is to be one of those 400 or so....
As for the money, there is nothing exceptional about pilots' salaries these days. A great many other jobs and professions can and do pay more, and without quite such an enormous investment up front. It is possible to earn over 100k in this country from flying, but the numbers who do are very small! For the majority of commercial pilots in UK, 40-50k is probably the most they'll see, and a great many have to make do on half of that.
We're not being negative, but we are trying to make you see the reality of this business. I hope your positivity eventually nets you one of those 100k jobs, but you're going to have to settle for far less for 20-odd years beforehand.
Scroggs