Welcome...
You know, when I have to do something that I know is right for me but I equally know others will not approve of I usually get down on my knees and ask for help.
What I have seen in hindsight is that there was pretty much always a reason that I "needed" to do it, and it is usually to help someone in the future that will need my strength and experience to help them through.
Maybe one day your parent will fall from his denial and need your experience, strength and hope to walk through those doors....
Go with what you know in your Gut.