Yeah, but look (listen) to how often Kirk is mentioned in TNG-DS9-Voyager.
Here are all the
references to Kirk in the 24th-century shows:
TNG:
"The Naked Now" (because they encounter the same disease)
"Unification" (mentioned by Spock)
"Relics" (mentioned by Scott)
Nemesis (Riker uses a "Kirk Epsilon" defense pattern)
DS9:
"Crossover" (explaining Mirror Universe backstory)
"The Sword of Kahless" (by Worf in connection to Kor)
"Trials and Tribble-ations" (for obvious reasons)
VGR:
"Flashback" (ditto)
"Concerning Flight" (Janeway says Kirk claimed he met Leonardo da Vinci)
"Q2" (Icheb's report on Kirk)
"Friendship One" (an admiral likens
Voyager's first contact record to Kirk's)
So really, with only a couple of exceptions, Kirk is never mentioned
except by characters who knew him personally or who are encountering things he also encountered. So it's not like people are going around constantly name-dropping him in casual conversation. He mostly only came up when he was relevant.
So really, the question isn't why people didn't
mention Archer as often as Kirk, it's why they didn't
encounter people or things connected to Archer as often as they encountered people or things connected to Kirk. And maybe the greater historical distance could account for that where the 24th-century shows are concerned. But of course the real explanation is just that Archer hadn't been created yet.