People are allowed to live their normal lives while living in an apartment. With some apartment buildings, particularly older or converted buildings, noise transmission can be a problem, and that is typically worse for a neighboring or downstairs unit. But no tenant has to avoid creating noise consistent with activities of daily life, even if the noise is poorly contained and is bothersome to tenants in adjacent units.
The landlord cannot unlawfully discriminate against tenants with families, or tell them that they have to constrain their lawful activity in their own home. The landlord is thus offering to accommodate you by moving you to another unit where (at least at present) you will enjoy more quiet. Assuming that it can be managed, it would be sensible for you to request a unit on the top floor, and ideally one with as few shared walls as possible

