No. Idiots who think a gay voice is the reason you shouldn't be taken seriously are the reason why people with a "gay voice" (gay is not a voice but okay) are more likely not to be taken seriously
yes, it does make people not take you seriously. like, i doubt anyone's seriously considering any of your emotions or opinions if they just think you're a stereotype
If your friends aren't taking you seriously because of your voice, you need new friends!
And like Ezra said, if people underestimate you because of stupid **** like this, use it to your advantage! Develop your writing and speaking skills, be the smartest person in the room, become passionate about something. **** judgmental people.