No. The Lord is faithful on His part: Jesus as Savior really saves "whosoever."
If you saved a man from drowning tomorrow, just because he might commit suicide 30 years from now doesn't mean you didn't save him from death. You did. You were faithful.
There are several dimensions of salvation in Scripture: Future tense (heaven); present tense: knowing Christ now; past tense (Calvary).
A man who is spiritually saved is operating both upon past tense (Calvary) and present tense (knowing Christ). Salvation from this earth, as Jesus' letters to the 7 churches in Revelation 2 & 3 emphasize over & over, includes "enduring to the end" and being an "overcomer." That's not something we do in our own power, by the way, in case you're tempted to inject works again into the picture.
Anyway, in addition to be saved "for" something, there's also things we are saved "from": sin & the devil, for example. A person who calls upon the name of the Lord is subject to be saved from sin and the devil.
If they don't reject the true Christ anytime later in their life, then salvation from hell is also a future reality. As for those who lose their salvation, please read Hebrews 6.
I don’t buy it.
If loss of salvation is true, and it is true that we continue to sin just as Paul says in Romans 7; therefore, no saved person will be saved.
It makes more sense that Salvation is final.