It's a worthwhile comparison to make. You are focusing on "Bitcoin dominance" but you are ignoring that Litecoin massively outperformed both BTC and the entire altcoin market during it's pre-halving pump this year. That's a pretty strong indication that halving-driven demand is a real thing. That spells real implications for the BTC market as we approach the 2020 halving.
I will never agree that comparisons of BTC with LTC or any other altcoin should be done,
and especially that we should be afraid that BTC halving will have zero effect like LTC halving (long term).I certainly never argued anything like that. On the contrary, in fact.
LTC's first halving occurred in August 2015. At the time, it was trading around $3. Today, it trades around $41. Zero long term effect? You tell me.
Short term, the effects are apparent too. From April-June 2015, LTC jumped 810% in price. In hindsight, this was obviously "the halving pump" that also occurred before BTC's halvings in 2012 and 2016 and LTC's 2nd halving in 2019.