Of course not.
First, a physician would never advice to take salt out of the diet (completely), the advice would be “do not use too much salt” - and maybe tell how many milligrams of salt he recommends in your diet - based upon your physical condition. That is an objective advice. But this is again not the point! Does the specified amount of salt TASTE salty or does it TASTE bland… Truly, you guys are amazing.
Well, no, Hee_Zen, the “amazing” appellation applies to you in spades. Intellectual honesty or rigor should have led you to concede the point rather than argue against it.
A person who claims a dish is “too salty” may, in fact be making one of several possible claims, made very obvious fom your example above.
Suppose they are on a salt restricted diet. If that were the case, then the person stating that the dish is “too salty” for them is making an objective claim that eating what has been set before them is likely to be bad for them, health wise - their taste buds being used as a rough gauge for the quality of “saltiness.”
If the person has no salt restrictions then they, in fact, may be making a preference claim that they prefer a less salty configuration to their meals.
In other words, “too salty” could be an objective claim or it could be merely an expression of subjective preference. That was obvious from your example and yet you glossed over it hoping we would miss it, it would seem that way, anyway.
Go back to my post on the distinction between preference claims, judgements and statements of fact. “Too salty” could mean a preference, but it could also be a judgement by the person in terms of the amount of salt being too much for their health to bear.
Likewise, “too spicy” could be a preference claim, but it could also be a statement of judgement or fact that eating the dish will almost certainly result in heartburn or indigestion for them. “Too spicy” is not automatically a claim of subjective preference. In fact, it makes sense for someone to say "I prefer or like spicy foods, but my digestive system cannot bear it. A claim of “too spicy” would, then, be objectively grounded and not subjective, at all, contrary to your last post.