"I've always been a lifelong (insert part of choice) voter....."

I have deliberately put this under the "Ask a gran" thread, rather than news & politics, just in case anyone thinks I've lost it.

I am intrigued by this, as in the lifelong thing etc. There was a chap interviewed on the radio the other evening, you know the sort of interview, this one went "I've always voted Labour, like my father and grandfather before me, don't think much of Corbyn, but I'll still be voting Labour"

Sorry, but why? Party's manifestos change, their attitude to some crucial issues change, their leadership changes, (not always for the better), so why not approach each election with an open mind, listen to the policies, think about their impact on you personally,your local area and perhaps the country as a whole, then decide who to vote for.

I would like to stress that I am NOT trying to be contentious, (as some may know I usually stick to "fluffy" posts about cats and underwear, not related of course ) it really is a genuine question. And although the quote I used from the Radio mentioned Labour, my question applies to any habitual voting.

Just because something has always been done, does it have to continue? (children up chimneys comes to mind)

I look forward to reading any responses, although no doubt I will end up with the tin helmet behind the sofa..