In fact you can ask questions about why it should ever have existed, but now why should it exist.
1	In	in	ADP	IN	_	2	case	2:case	Discourse=adversative-antithesis:24->23:1
2	fact	fact	NOUN	NN	Number=Sing	5	obl	5:obl:in	_
3	you	you	PRON	PRP	Case=Nom|Number=Sing|Person=2|PronType=Prs	5	nsubj	5:nsubj	Entity=(37-person-acc:com-cf2-1-ana)
4	can	can	AUX	MD	VerbForm=Fin	5	aux	5:aux	_
5	ask	ask	VERB	VB	VerbForm=Inf	0	root	0:root	_
6	questions	question	NOUN	NNS	Number=Plur	5	obj	5:obj	Entity=(38-abstract-new-cf3-3-sgl
7	about	about	ADP	IN	_	8	case	8:case	Discourse=elaboration-additional:25->24:0
8	why	why	SCONJ	WRB	PronType=Rel	5	obl	5:obl:about	_
9	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	13	nsubj	13:nsubj	Entity=(29-organization-giv:act-cf1*-1-ana-NATO)
10	should	should	AUX	MD	VerbForm=Fin	13	aux	13:aux	_
11	ever	ever	ADV	RB	Degree=Pos	13	advmod	13:advmod	_
12	have	have	AUX	VB	VerbForm=Inf	13	aux	13:aux	_
13	existed	exist	VERB	VBN	Tense=Past|VerbForm=Part	8	advcl:relcl	8:advcl:relcl	Entity=38)|SpaceAfter=No
14	,	,	PUNCT	,	_	20	punct	20:punct	_
15	but	but	CCONJ	CC	_	20	cc	20:cc	Discourse=restatement-partial:26->23:2
16	now	now	ADV	RB	_	20	advmod	20:advmod	_
17	why	why	ADV	WRB	PronType=Int	20	advmod	20:advmod	_
18	should	should	AUX	MD	VerbForm=Fin	20	aux	20:aux	_
19	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	20	nsubj	20:nsubj	Entity=(29-organization-giv:act-cf1*-1-ana-NATO)
20	exist	exist	VERB	VB	VerbForm=Inf	5	conj	5:conj:but	SpaceAfter=No
21	.	.	PUNCT	.	_	5	punct	5:punct	_
