Short answer
Excessive wedding spending can create unnecessary financial pressure and distract from the purpose of marriage.
Islamic Guidance
What Islam teaches
Islam encourages moderation and discourages wastefulness. Marriage should not become a competition in spending, status or public display.
Practical Guidance
What you can consider
Set a realistic budget, avoid unnecessary debt and prioritize the couple's future financial stability over a single day's social display.
Sources
Qur'an 7:31; Qur'an 17:26-27.