that's absolutely not true!
a splice eye is not safer than a properly tied triplefisherman.
a triplefisherman has the advantage of self cinching without a major loss of strength. VS a girth hitch loses substantially more strength, which is needed to cinch to biner. even a tight spliced eye will not cinch like a triplefisherman.
All climbers should be aware that girth hitching any Dyneema slings, regardless of size, causes them to lose around 50% of their strength. girth hitching standard climbing line could result in strength loss of 30% vs a triplefisherman loses about 10%
there's documented instances of factory spliced eyes failing.
same could be also said of knots failing from being improperly tied.
personally don't trust factory splices... my triplefisherman is tied by me...
I KNOW my life can be trusted to that knot. I cannot say the same about a splice not done by me.
look at the triplefisherman on a split tail tied by me below... easy visual check that knot is 100% tied correctly and will not fail. can you say the same about any factory spliced eye?