Why non swimmers think their opinions matter?!

Okay so compared to some of you I am barely wet or a swimmer yet,, but I have started swimming again back in Sept of this year and am going 4 mornings a week. I am pretty proud of myself and can see that this is something I am going to do for life. A. because I like it and B. because I have to for both my physical and mental health. So as my friends and co-workers realize what I am doing I am surprised that 75% of them think I am crazy. Why would I do that? Getting up so early is dumb? I am never going to keep doing this. I am over 40 so I should be happy with who I am. OMG it makes me crazy:frustrated:. The other 25% might think the early morning practices are crazy but they think what I am doing is wonderful. ( though they would never do it :lmao:) I just do not understand why people think they can tell me what they think especially when it is negative and really none of their business. My one girlfriend who is in kick A$$ shape said " they are jealous" they are used to seeing you how you are. To know that you are going to change your body and just be more mentally strong makes them realize that they are weak. I laughed but maybe she has a point. Another wise friend said, " they have not gone through what you have in the past couple of years: Thryoid cancer and a daughter diagnosed with Retinitis Pigmentosa ( degenerative eye disease) so they dont know that you need to do this for you. I think there is a time in ones life to step it up and really enjoy and push yourself or stay the same and watch your body and mind start to deteriorate. I AM READY FOR CHANGE. But I just wish people would stop giving me their 2 cents when I never asked for their opinions in the first place. Please tell me this has happened to others, or I am just lucky to be surrounded by lots of would be Dr Phil's? Katie