But for junglers it is significantly worse. Your clear will not only be slower without the
and/or
's passives, but you will also lose a lot more health. Due to not having the extra exp from jungle items, you will also be very behind the enemy jungler and of everyone else (peharps even the supports, since they can at least share EXP with the ADC, and earn gold from their support items).
You also lose the valuable passives and actives from jungle items and jungle enchantments. Dueling power from red smite? You can't have that. Extra CC and true damage from blue smite? Sorry. Wards from the green smite? Forget about it. As for the enchantments, most of them are very valuable and necessary. Runic Echoes is a must for champions with AP scalings and mana issues. Cinderhulk is just that good on jungler tanks and fighters, as it allows their tankyness to scale better into late game, not to mention its synergy with Locket of the Iron Solari. Bloodrazor is a must for attack speed reliant junglers as most of them will probably go on-hit with some tankyness. The only enchantment that can be properly replaced with common items is Warrior, but even this enchantment gives a lot of AD for a very low cost.
Without Smite, you also lose the ability to contest objectives. Unless you are a
or
or have a
on your team, you can't really compensate for that. And even with their executes,
and
still take Smite, not only due to the aforementioned reasons, but because even with their executes they still want to ensure that the enemy will not steal objectives.
Junglers lose a lot from not taking Smite. Other lanes do not have their problem because even if they take the wrong spell, this is not the end of the world for them. Not only they don't rely on summoner spells to gain advantage in the game, but also they can actually make interesting strategies even with wrong summoner spells.
For example, a support with
will not be crippled as much, as supports don't rely on summoner spells to gain exp, gold, or to unlock items. With
a support can actually have incredible map pressure, especially if it is a tank support, because most of them have the ability to chain CC enemies when ganking. The reason why
for supports is not meta is because they are better off taking summoner spells that help them pressure the lane
or protect the ADC
, and reserving
for top laners which can take better advantage of it.