This is a time to get some bids from some independent mechanics. I show the motor mount as costing $60 or so, with lifetime parts warranty (Advance Auto). I suspect the Honda part is much higher and comes with less warranty. I suspect labor will be expensive, but it would pay to get the after market mounts with a life parts warranty in this case.
While I agree with you that 4 yrs and 65K miles sounds premature for replacement, Honda or any other car manufacturer is not obligated to conduct a recall or do anything if a part doesn’t meet its expected life. Your recourse is to purchase some other vehicle next time.