Professor,
If you mean by agendas, showing Jesus' life, death and resurrection to be the fulfilment of Jewish scripture, he is the saviour of the world etc then I'd agree.
Indeed agendas - as most of those things are subjective faith claims, not objective historical fact and hence a decision to include those, and how to include them is, in effect, the action of a political agenda. Had the early church focused on differing faith claims (and we know there wasn't consensus, hence so-called 'heretical' claims) then they'd have chosen, or created, alternative narratives that fitted their agenda.
And there are, of course, other gospels that also describe similar things that were rejected for inclusion, even though some have no more, nor less, claim to be accurate compared to the four gospels that were selected.
The point is firstly why these four, rather than more or less or different. And secondly to what extent the four that were selected were subject to alteration etc to create a more compelling narrative that aligned with the early church's political agenda. And we know of some hum-dinger alterations, most notably the addition to the end of Mark. That's just by chance and given that we simply don't have any actual textual evidence for the first 150 year or so from their purported writing we simply do no, and cannot know how many other alterations were made prior to the first actual manuscripts we have available. Given the huge number of inconsistencies and alterations in extant manuscript we have from about 250-400AD we can surely infer that there must have been many alterations from 100-250. Otherwise you have to claim that the gospels were unaltered up to 250 and then suddenly started getting altered post-250. That argument isn't credible.
This quote from Ehrman sums it up rather nicely:
'The victors in the struggles to establish Christian Orthodoxy not only won their theological battles, they also rewrote the history of the conflict; later readers then naturally assumed that the victorious views had been embraced by the vast majority of Christians from the very beginning ... The practice of Christian forgery has a long and distinguished history ... the debate lasted three hundred years ... even within "orthodox" circles there was considerable debate concerning which books to include.'So Spud, not only are you uncritically accepting the orthodox narrative thereby failing to recognise that alternative narratives existed in the early church, you are also failing to recognise that history was re-written by the victors (as it usually is). The very notion that we use the term heretical to describe those who took an alternative view emphasises that political rewriting to expunge and discredit those who lost the debate. The reality is that neither the 'orthodox' nor the 'heretical' stood their arguments one firmer ground than the others - both involved faith claims that had no credible evidence to support them.