TLDR: One laryngologist said I have paresis and was going to do a filler injection. I got a second opinion and the new laryngologist said I don't have paresis and said not to get the injection. I'm not sure what to do.

Hello, I'm an acting grad student, and I've been having vocal issues for the past year after getting long-covid. I came down with long covid in January and since then my voice has not been well. It will periodically get better and worse, but it is usually hoarse and a bit froggy and I lose it very easily. I also go through periods where my throat will feel extremely dry for a week or two, and it becomes painful to speak. Needless to say this has made it very difficult for me to do my schoolwork since it is mostly rehearsal and performance.

I saw eventually saw a laryngologist in August prescribed me speech therapy. Things gradually got worse after about a month and a half of speech therapy and so I got scoped again by the same laryngologist who said he thought I might have a slight paresis. This was determined both off the scope and from airflows. He said I was blowing 2-3 times as much air as I should when I spoke which indicated a glottal insufficiency. He prescribed more speech therapy and said he would do a filler injection if that didn't help. The therapy helped and I got a bit better over the next month, but progress plateaued and then things got worse again after I got a cold, and haven't gotten much better for the past month. Because I'm still having issues the laryngologist recommended I get the filler injection.

I sought out a second opinion before scheduling the injection and the new laryngologist told me he saw no evidence of a paresis. He strongly advised against the injection and said he didn't think it would help me. He said I have MTD and need more speech therapy. I attached a video of the scope he did 

I'm not sure which doctor to trust at this point and I'm desperate for something that will help because I'm missing out on my education by constantly losing my voice. Any advice would be greatly appreciated!

Not sure if I have paresis and what to do about it