Re: Easy win but challenging keep.
It's a really unattractive job. First of all, you have to spend years of doing crap like pushing leaflets through letterboxes, then spending time fighting campaigns that you will lose just to show that you work hard. Then you get selected for a marginal seat. But if you time it wrong, you just lose because your party is not in order. Then you become an MP where most of your day is just voting with the party, doing some trivial nonsense in select committees. Your personal life is considered as public record. Voters will bother you for all sorts of nonsense. And in 5 years you could be redundant and out of a job for a decade.
Why would you do that rather than working in medicine, software or engineering?