"Better to travel than to arrive", eh? Actually that, or something like it, was the original motto of Apple Computer. But if there is no truth, per se, then you can only posit approximations of something which in itself can never be known, so its an approximation of an unknown. In which case it is impossible to know if it is even a valid approximation.
Consider the Buddhist notion of truth. In the Buddhist view, the Buddha has arrived at a certain knowledge
of the cause of suffering and the end of suffering. The Suttas record in many places the sayings like 'done is what has to be done, the burden is cast aside, the fever of life is no more, the farther shore is reached', and so on. There is no equivocation or vagueness in it. It is unequivocal, definite, and certain, and has been verified by countless members of the Buddhist sangha since the initial 'turning of the wheel of dharma' in Sarnath 2,500 years ago.
Does this mean that all other religions are false? No, and this is not stated anywhere in the Buddhist canons. Does it mean that by believing this alone, the truth has been found? No, because the essence of the teaching is in learning, practising and applying it and realising the truth of it for oneself. But, at least in this case, it is being said that the truth has been ascertained, stated, and demonstrated; and not just the truth of this or that hypothesis or proposition, but a great truth about humanity as a whole. The teaching is presented on the basis of ehi-passako - 'come and see'. Anyone interested is able to verify it or test it in their own experience. Take or it or leave it, but it makes definite truth claims. Moderns are very uncomfortable with truth claims.