Of course you would trivialize the word for "all" simply to make it comply with your own view of things. And yet the precise meaning of the word is the critical aspect of the interpretation. In your soteriology, it is mandatory that the word "all" does not really mean the same throughout the sentence.
It can in a sense---but that "sense" must be compatible with and in agreement with the rest of Scripture on the same subject. Let's look again.
18.Therefore, as one trespass led to condemnation for all men, so one act of righteousness leads to justification and life for all men.
One way this could mean all without exception when we consider the previous words of Paul is that all without exception were condemned by the one act of trespass by Adam, (without exception) the all men being justified by the one act of righteousness (Christ) all men who are in Christ, without exception, are justified.
It can mean by "all" all men everywhere and always are condemned by the one act of trespass and all men everywhere can be justified but only in one way---Christ.
What it cannot mean is that all men without exception are condemned in Adam and justified in Christ. For one thing, in the very next sentence Paul no longer uses "all" but "many" and for both Adam and Christ.
And look at what Paul has already said in verse 1.
Therefore, since we have been justified by faith, we have peace with God through our Lord Jesus Christ. 2. Through him we have also obtained access by faith into this grace in which we stand, and we Rejoice in hope of the glory of God.
Paul has already qualified the "many" and the "all" by faith. The "we" and "our", he is writing to are believers. Those who are in Christ and are justified through faith. Not all men without exception. We are justified through faith. Christ's death on the cross did not justify everyone so that all are born already justified.
And what about Paul's use of "many"? He uses "many" in verse 15
But the free gift is not like the trespass. For if many died through one man's trespass, much more has the grace of God and the free gift by the grace of that one man Jesus Christ abounded for many.
Since we all know that all men without exception die, so many must be a numerical quantity. And also in the case of the "many" who receive grace. However, the second cannot mean without exception, except in the sense that all who receive this grace without exception, receive this same grace They receive faith (Eph 2:8) and through this faith salvation and justification.
Paul concludes this discussion:
Now the law came in to increase the trespass, but where sin increased, grace abounded all the more, so that as sin reigned in death, grace also might reign through righteousness Leading to eternal life through Jesus Christ our Lord.