Is philosophy a poor system at understanding things and can it be extremely lazy?

I’ve only just been thinking about this so sorry it’s not thought out.

This is mainly about my hate when people use the word subjective.
If I went who looks better than who, a philosopher may say it’s subjective and there is no better looking person.

What about if I got some mud and a chocolate bar, what one tastes better? Again you could say it’s subjective though I feel that’s a very lazy answer, if you asked multiple people you would have a good understanding of what one on average tastes better and using maths and science you can work out why that is.

I’ve been thinking about it after reading this
http://commonsenseatheism.com/?p=13737