This is one of those "the law in its majestic equality" things. It's not practically possible to compete with the full-time political parties without being a full-time political party. And a society that separates its politicians from its people is as bad as that quote about separating its scholars from its warriors.
> The fact that you can’t be bothered to take part in the political life of your country
I get involved, more at a local level, but at a national level I vote, and occasionally I write to my MP - who is a named individual representing a fairly small number of people who can therefore actually hold him accountable. Piss off your constituents enough and it doesn't matter how much the party likes you. Which is a system I'm very happy with, and something that's deeply missing from the EU.