A lot of people do spend time on foundations but for most physicists and their day to day work worrying about such things is like a programmer worrying about the Halting problem or whether the problem is in NP or a mathematician worrying about the second incompleteness theorem or even Russell's paradox. Sure those are deep results but they have to get on with their work.
But things have moved on with foundations and if you read about what is called the neo-copenhagen interpretation you will find a lot of the hoopla and confusion of quantum mechanics goes away and the door is opened to even more astounding interpretational consequences.
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A lot of people do spend time on foundations but for most physicists and their day to day work worrying about such things is like a programmer worrying about the Halting problem or whether the problem is in NP or a mathematician worrying about the second incompleteness theorem or even Russell's paradox. Sure those are deep results but they have to get on with their work.
But things have moved on with foundations and if you read about what is called the neo-copenhagen interpretation you will find a lot of the hoopla and confusion of quantum mechanics goes away and the door is opened to even more astounding interpretational consequences.