If you can't impeach someone who lies to the FBI & who has clearly tried to obstruct an investigation then you're saying a person should be above the law if he has enough power. Your entire constitution becomes toilet paper & your Republic meaningless, existing in name only.
1998?
A. Impeachment did occur in 1998. Clinton was simply acquitted.
B. Literally none of those things listed occurred or were committed by Clinton in any way related to his impeachment, or arguably at all during his administration. He had some ethical issues to be sure, But none of those things were involved.
Once again, reality and you are quickly divorced.