Are warm showers as therapeutic as hot showers because really hot showers make me feel suffocated?

Yes. Really hot showers can actually be dangerous if you are pregnant or have blood pressure problems. They can cause your skin blood vessels to dilate to try and cool you down. This will divert blood from your brain to your skin and can make you dizzy to the extent that you might faint. The main therapeutic effects of hot showers are that they make you feel better, so do what works for you.
It's about you. The warmth of the shower is about how it makes you feel. If a warm shower is better for you than by all means go warm and leave the hot for someone else.