It's obvious that if you "recharge" your channel with lower amounts, you'll do it within LN itself. You would be connected via LN to your exchange, or if you're a merchant, to most of your clients.
Eh? If you have a channel with A and a channel with B and can simply fund B from A, then why have 2 channels in the first place? This makes no sense!
So I don't think the average fee to open a channel would be higher than $50. I guess it will be much lower. It's likely that we'll never see again the extreme congestion in December as the reasons were spam attacks, a strong bubble, and Christmas.
You're a dreamer. Just like all the other LN adapts.