I would say your logic is flawed OP. As far as the music you mentioned goes those bands got popular off of their 'quirkier' albums from their early catalgoue not to mention that music technology doesn't regularly advance making previous albums sound inferior by comparison. Also a huge number of bands are criticised in the exact same way for essentially broadening their music (for example Muse's most recent album was much more akin to chart music than "their own" sound from previous albums, alienating a lot of their old fans); how many times have you heard someone say "their old stuff was so much better".
As for games the example you gave was Ocarina of Time, one of, if not the, most popular and critically acclaimed games of all time, suggesting that that game was widely popular because it was good rather than because it catered to the masses at the expense of its previous audience. When people talk about broadening an audience as a bad thing in gaming it's because it only seems to be used for sequels and only when said sequel will depart from the typical makeup of the previous games in favour of being more generic, for example Dead Space 3.
I'm not saying it's always a bad thing for a game to aim to appeal to more people however when a game already has a core audience that it knows enjoys the franchise as it is there's no quality based reason to suddeny cater to the masses instead, all it does is potentially increase the income of new releases. Sometimes a first entry might not get a particularly big audience to the point that it's in danger of dying out, in those circumstances it makes sense to try and fix whatever has put the majority of other gamers off. If, on the other hand, said franchise has its own "flavour" so to speak and is still pulling in steady profits the only reason to ditch the best, most unique aspects of the game is sheer greed.
As for games the example you gave was Ocarina of Time, one of, if not the, most popular and critically acclaimed games of all time, suggesting that that game was widely popular because it was good rather than because it catered to the masses at the expense of its previous audience. When people talk about broadening an audience as a bad thing in gaming it's because it only seems to be used for sequels and only when said sequel will depart from the typical makeup of the previous games in favour of being more generic, for example Dead Space 3.
I'm not saying it's always a bad thing for a game to aim to appeal to more people however when a game already has a core audience that it knows enjoys the franchise as it is there's no quality based reason to suddeny cater to the masses instead, all it does is potentially increase the income of new releases. Sometimes a first entry might not get a particularly big audience to the point that it's in danger of dying out, in those circumstances it makes sense to try and fix whatever has put the majority of other gamers off. If, on the other hand, said franchise has its own "flavour" so to speak and is still pulling in steady profits the only reason to ditch the best, most unique aspects of the game is sheer greed.