We have a lot of sins. Even, every day have been making new sins. So, it is a must for us to seek pardon from Allah. Not to eradicate our sin, but also to gain so many virtue from it.
The Messenger of Allah (ﷺ) said,
من لزم الاستغفار ، جعل الله له من كل ضيق مخرجاً ومن كل هم فرجاً، ورزقه من حيث لا يحتسب
❝If anyone constantly seeks pardon (from Allah), Allah will appoint for him a way out of every distress and a relief from every anxiety, and will provide sustenance for him from where he expects not.❞ [Narrated by Abu Daud].
So, seeking pardon from Allah. Not only Allah will forgive us, but Allah also will give us solutions to our problems.