Chicup has done a wonderfully patient job of explaining squirting from a biologic point of view. Anger has nothing to do with what squirting is. Nor does attitude toward doctors.
The confusion here is that squirting is not one thing, as has been pointed out numerous times in this thread. Most of the posts have dealt with copious squirts, those with a lot of fluid, as in cups to a quart, as well as a lot over time, repeated squirts. These come from the urethra, as anyone who observes closely can see.
By the way this male writes alongside his wife, who squirts, and she has made it very clear that she knows her squirts, large ones, are pee.
There simply is no other place that produces this quantity of liquid exiting the urethra other than the bladder. Urine is often clear, doesn't have a lot of taste, and sometimes is sweet. It is constantly produced so can be squirted repeatedly, no matter whether the bladder has been "emptied." Orgasms can expell urine from the bladder more effectively than urinating can.
The other type of squirt, teaspoons or so, are different. Those tests online are of this type of squirt, so of course it doesn't test as urine. Then this type is confused with the soak the bed type.
We males don't ejaculate cups of semen. Peter North may squirt a tablespoon or so, but most of us squirt in the teaspoon range.
This smaller quantity of squirt often comes from the vagina and likely is the lubricating fluid of the vagina. Orgasms can as effectively expell the lubricant from the vagina as it can from the bladder, but there is far less of it.
Confusing these two types of squirt is one of the main confusions about squirts. Most of the posts in this thread have been about the soak the bed type of squirts.
Getting angry over this subject means you have an emotional investment in what you believe. Unfortunately anger has nothing to do with whether what you believe is correct.