@Zebras I believe your feeling is because you are used to “occlusion effect”.
I did the change the other way round. Till 2018 I had hard vented ear molds. At the end of that year I closed the vents. In 2019 I bought soft ear molds w/o vents. The “volume” sound increased dramatically. This is very cool for listening to streamed pop music. The soft silk reduced feedback so I could increase high pitched high amplified sound as well.
For your loss this is no longer necessary. You only need a little amplification in your lows and highs but you need much in the middle. In fact you don’t need any amplification in the lows. You get most information from speech in middle and high frequency range. You get little benefit by increasing low frequency. Indeed there is the most noise you don’t need for intelligibility. Without the lows increased it should be eayier for you to listen to someone talking. Open vented hard ear mold sound tinny but you get a better S/N ratio. In very loud situations soft silk may prevent low sound from reaching your eardrum. But damping is at most by 20dB. Most of the time you will like open vented hard ear molds. Try them a couple of times.
My age is 50%, em, increased but this factor decreases every year a little bit